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Cisco IE 3000 Switch Command Reference
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Chapter 2    IE 3000 Switch  Cisco IOS Commands
  show udld
Related Commands Command Description
udld Enables aggressive or normal mode in UDLD or sets the 
configurable message timer time.
udld port Enables UDLD on an individual interface or prevents a fiber-optic 
interface from being enabled by the udld global configuration 
command.
udld reset Resets all interfaces shutdown by UDLD and permits traffic to begin 
passing through them again.